w3 python

Question 1

py

What is a correct syntax to output “Hello World” in Python?

Answer 1

print(“Hello World”)

Question 2

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How do you insert COMMENTS in Python code?

Answer 2

#

Question 3

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Which one is NOT a legal variable name?

Answer 3

my-var

Question 4

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How do you create a variable with the numeric value 5?

Answer 4

x = int(5)
or
x = 5

Question 5

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What is the correct file extension for Python files?

Answer 5

.py

Question 6

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How do you create a variable with the floating number 2.8?

Answer 6

x = float(2.8)
or
x = 2.8

Question 7

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What is the correct syntax to output the type of a variable or object in Python?

Answer 7

print(type(x))

Question 8

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What is the correct way to create a function in Python?

Answer 8

def myFunction():

Question 9

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In Python, ‘Hello’, is the same as “Hello”

Answer 9

True

Question 10

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What is a correct syntax to return the first character in a string?

Answer 10

x = “Hello”[0]

Question 11

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Which method can be used to remove any whitespace from both the beginning and the end of a string?

Answer 11

strip()

Question 12

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Which method can be used to return a string in upper case letters?

Answer 12

upper()

Question 13

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Which method can be used to replace parts of a string?

Answer 13

replace()

Question 14

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Which operator is used to multiply numbers?

Answer 14

*

Question 15

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Which operator can be used to compare two values?

Answer 15

==

Question 16

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Which set of characters are used to define a LIST?

Answer 16

[“apple”, “banana”, “cherry”]

LISTs use brackets.

Question 17

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Which of these collections defines a TUPLE?

Answer 17

(“apple”, “banana”, “cherry”)

TUPLEs use parentheses

Question 18

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Which of these collections defines a SET?

Answer 18

{“apple”, “banana”, “cherry”}

SETs use curly braces

Question 19

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Which of these collections defines a DICTIONARY?

Answer 19

{“name”: “apple”, “color”: “green”}

DICTIONARIES have the first term colon construction.

Question 20

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Which collection is ordered, changeable, and allows duplicate members?

Answer 20

LIST

Question 21

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Which collection does not allow duplicate members?

Answer 21

SET

Question 22

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How do you start writing an if statement in Python?

Answer 22

if x > y:

Question 23

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How do you start writing a while loop in Python?

Answer 23

while x > y:

Question 24

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How do you start writing a for loop in Python?

Answer 24

for x in y:

Question 25

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Which statement is used to stop a loop?

Answer 25

break

Question 26

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Dictionary

Answer 26

Used to store key:value pairs

Dictionaries are ordered, changeable, and do not allow duplicates.

this_dict = { "brand": "Ford", "model": "Mustang", "year": 1964 }

Question 27

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thisdict = { "brand": "Ford", "model": "Mustang", "year": 1964 }

x = thisdict["model"]

What is X?

Answer 27

x pulls “model” from thisdict. Which is Mustang.

Question 28

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how do you enter the python command line interpreter?

Answer 28

by typing “python” into the command line.

Question 29

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how do you exit the python command line interpreter?

Answer 29

by typing “exit()”.

Question 30

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how do you check your version of python on windows?

Answer 30

type “python –version” into cmd.

Question 31

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how do you check the python version on Mac and Linux?

Answer 31

by typing “python –version” into terminal

Question 32

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how do you run a python program from the CLI?

Answer 32

Navigate to the folder where the file is saved and type “python filename.py”

Question 33

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What is the output:

import sys

print(sys.version)

Answer 33

the python version